Question

find the surface area of a cylinder with a height of 7 inches and a radius of 3 inches. use circumference = 3.14, and round the answer to the nearest whole number

Answer 1

Surface area = 9*pi + 42*pi = 51*pi (given pi = 3.14, you can calculate the rest).

Answer 2

>>circumference = 3.14

Just guessing but I think you are using the word "circumference" in place of the number "pi"

Answer 3

yes pi

Answer 4

Surface area of cylinder = 2 π r h + 2 π r ²

2 π r h is the lateral (side) area and 2 π r ² is the sum of the areas of the two circular bases.

Answer 5

Surface area of cylinder = 2 π r h + 2 π r ²
= 2 π (3) (7) + 2 π 3 ²
= 42 π + 18 π
= 60 π
= 60 ( 3.14)
= 188.4 approx

Answer 6

The nearest whole number would be 188 but I did not put in 3.14 for pi until the end. Just a second and I'll see if it made a difference in the whole number answer.

Answer 7

I did 42 (3.14) + 18 (3.14) and got 188.4 which is 188 to the nearest whole number.

Answer 8

Oh yeah.....I forgot to add one more "area of the circle". Just added only one. Sorry.